Maybe one of these similar products would be of interest:-
For SHOEI Z8 Racing Air Helmet Spoiler Wing Diffuser EXtension Shoei Z8
SHOEI Anti Fog Pinlock Evo Insert Clear Shoei CJ2 J-Cruise-II - DKS105
SHOEI J-Cruise 1 J-Cruise 2 J-Force 4 CJ-2 visor Clear Blue
Shoei RJ-Platinum/J-Wing Helmet Inner Top Liner Center Pad Black